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					UNIVERSITY OF CINCINNATI                                                    Environmental
University Health Services                  556-4968                     Health and Safety

ADVISORY 15.0:          STORAGE OF FLAMMABLE AND COMBUSTIBLE LIQUIDS

INTRODUCTION
Regulations for the storage of flammable and combustible liquids in containers on State of Ohio-owned
property are governed by the Ohio Fire Code. Specific laws, rules and regulations required by the
Ohio Fire Code are based on the Building Officials and Code Administrators (BOCA) Basic Fire Code,
with approved amendments by the State of Ohio.

DEFINITIONS
Definitions applicable to this advisory follow in the section below.
Approved
   Signifies acceptance by the authority having jurisdiction of design, equipment, installation, or
   intended use as required by National Fire Protection Association (NFPA 30). Devices that have
   been tested and accepted for a specific purpose by a nationally recognized testing laboratory may
   be deemed acceptable (e.g. Underwriter's Laboratories, Inc. listed or Factory Mutual approved).
Boiling Point
    Is the boiling point of a liquid at a pressure of 14.7 p.s.i.a. Where an accurate boiling point is
    unavailable for the material in question, or for mixtures which do not have a constant boiling point,
    for purposes of this classification, the 10 per cent point of a distillation performed in accordance
     with Standard Method of Test for Distillation of Petroleum Products, American Society of Testing
    and Materials, ASTM D86-62 may be used as the boiling point of the liquid.
Combustible Liquid
   Is a liquid having a flash point at or above 100oF (37.8oC) and is subdivided as follows:
    –   Class II liquids include those having flash points at or above 100oF and below 140oF (60oC).
    –   Class IIIA liquids include those having flash points at or above 140oF and below 200oF (93.4o
        C).
    –   Class IIIB liquids include those having flash points at or above 200oF.
Fire Areas
    Means an area of a building separated from the remainder of the building by construction having
    a fire resistance of at least one-hour and having all communicating openings properly protected
     by an assembly having a fire resistance of at least one-hour.
Flammable Liquid
   Is any liquid having a flash point below 100o F. These liquids are known as Class I and are
   subdivided as follows:
    –   Class IA liquids include those having flash points below 73oF (22.8oC) and having a boiling
        point below 100oF.

    –   Class IB liquids include those having flash points below 73oF and having a boiling point at or
        above 100oF.
    –   Class IC liquids include those having flash points at or above 73oF and having a boiling point
        at or above 100oF.
Flash Point
    The flash point of a liquid means the temperature at which it gives off vapor in sufficient
    concentration to form an ignitable mixture with air near the surface of the liquid within the vessel
    as specified by appropriate test procedure and apparatus.


Adv. 15.0:                       Storage of Flammable                                  Rev. 02/28/97
                                and Combustible Liquids

                                        Page 1
                                                                                      http://ehs2.uc.edu
UNIVERSITY OF CINCINNATI                                                    Environmental
University Health Services                  556-4968                     Health and Safety

Safety Can
   Is an approved container, of not more than five-gallon capacity, having a spring-closing lid and
   spout cover and so designed that it will safely relieve internal pressure when subjected to fire
   exposure.

REQUIREMENTS OF THE STATE FIRE CODE
Section F-2905.0 of the Ohio Fire Code limits the size of containers that may be used for the storage
of flammable and combustible liquids, depending upon the material in the container, as well as the
construction of the container. In addition, it defines the maximum permissible storage for flammable
or combustible liquids in office, educational and institutional occupancies.
Container Storage Size - The following is a synopsis of the pertinent parts of the Ohio Fire Code
pertaining to the storage of flammable and combustible materials in containers. Container size and
material of construction are determined by the physical characteristics of the liquid (see definitions of
flammable and combustible liquids). Containers and portable tanks for flammable and combustible
liquids shall conform to Appendix No. 1.
Exclusions from Container Storage - Medicines, beverages, foodstuffs, cosmetics and other common
consumer items, when packaged according to commonly accepted practices, shall be exempt from the
requirements of this section. In addition, Class IA and Class IB flammable liquids may be stored in
glass of not more than one (1) gallon capacity if the required liquid purity (such as ACS analytical
reagent grade or higher) would be affected by storage in metal containers, or if the liquid would cause
excessive corrosion of the metal container.
Storage Inside Buildings or Structures - Storage of flammable and combustible liquids is limited to that
required for operation of office equipment, maintenance, demonstration, treatment and laboratory
work. All liquids in laboratories shall meet the following storage provisions:
§   Not more than ten (10) gallons of flammable liquids shall be stored outside of an interior storage
    room or approved storage cabinet;
§   Not more than twenty-five (25) gallons of flammable liquids shall be stored in safety cans outside
    of an interior storage room or approved storage cabinet;
§   Not more than sixty (60) gallons of combustible liquids shall be stored outside of an interior storage
    room or storage cabinet;
§   Quantities of flammable and combustible liquids in excess of those set forth in this section shall be
    stored in an approved interior storage room or storage cabinet.
§   No more than one hundred and twenty (120) gallons of flammable or combustible liquids shall be
    stored in a flammable liquid storage cabinet with no container exceeding five-(5) gallon capacity.
     Of this total, not more than sixty (60) gallons may be of Class I and Class II liquids. Not more than
    three (3) flammable liquid storage cabinets may be located in a single fire area.
§   Quantities greater than defined shall be stored in an approved flammable liquid storage room.
    (Approval from the State Fire Marshall or his authorized representative is required).
§   Refrigerators and coolers used for storage of flammable liquids shall be used only if they are
    approved explosion proof appliances.
Requirements for Marking and Labeling - Every container of flammable or combustible liquids must
be clearly labeled. In addition, safety cans or other portable containers of flammable liquids having
a flash point at or below 80oF (26.7oC), excluding shipping containers must be painted red with some
additional clearly visible identification, either a yellow band around the can or the name of the chemical
conspicuously painted or stenciled on the can in yellow.
Dispensing Flammable Liquids
Adv. 15.0:                       Storage of Flammable                                   Rev. 02/28/97
                                and Combustible Liquids

                                        Page 2
                                                                                      http://ehs2.uc.edu
UNIVERSITY OF CINCINNATI                                                     Environmental
University Health Services                  556-4968                      Health and Safety

§   The dispensing of Class I, II or IIIA liquids from containers larger than five-gallon capacity shall be
    in an approved flammable liquid storage room and is limited to not more than three 55-gallon
    drums at any one time.
§   An approved safety pump must be used with Class I and II liquids. Dispensing Class IIIA liquids
    requires the use of an approved self-closing safety faucet, a bonding wire between the drum and
    the container being filled, and a grounding wire connecting the drum to ground. In locations where
    flammable vapors are present, precautions should be taken to control or eliminate sources of
    ignition.




Adv. 15.0:                       Storage of Flammable                                    Rev. 02/28/97
                                and Combustible Liquids

                                         Page 3
                                                                                       http://ehs2.uc.edu
UNIVERSITY OF CINCINNATI                                              Environmental
University Health Services          556-4968                       Health and Safety

APPENDIX 1

        MAXIMUM ALLOWABLE SIZE OF CONTAINERS AND PORTABLE TANKS

Liquids                         Flammable Liquids                            Combustible
Container Size        Class IA    Class IB      Class IC         Class II Class III
Glass                  1 pt.           1 qt.          1 gal.               1 gal.      5 gal.
Metal (other           1 gal.          5 gal.         5 gal.                5 gal.     5 gal.
than DOT
drums ) or
approved plastic
Safety cans             2 gal.          5 gal.        5 gal.                5 gal.      5 gal.
Metal drums            60 gal.        60 gal.       60 gal.                60 gal.     60 gal.
(DOT spec.)
Approved              660 gal.       660 gal.       660 gal.              660 gal. 660 gal.
portable tanks

                             (gal. = gallon; pt. = pint; qt. = quart)




Adv. 15.0:              Storage of Flammable                                        Rev. 02/28/97
                       and Combustible Liquids

                                 Page 4
                                                                                http://ehs2.uc.edu

				
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